throw new AssertionError(String.format("%s should not exist:\n%s", this, String.join("\n", descendants)));
            }
        }
        return this;
    }

    public TestFile assertContents(Matcher<String> matcher) {
        assertThat(getText(), matcher);
        return this;
    }

    public TestFile assertIsCopyOf(TestFile other) {
        assertIsFile();
        other.assertIsFile();

            }
        '''.stripIndent()

        when:
        run 'copy'

        then:
        file('dest').assertHasDescendants('path/file.txt')
        file('dest/path/file.txt').assertContents(Matchers.containsText("file1"))
    }

    @Issue("https://github.com/gradle/gradle/issues/5748")
    def "duplicate detection works when . is a path segment"() {
        // FAIL
        given:

    server.enqueue(response)
    server.enqueue(response)
    assertContent("ABCDEFGHIJKLMNOPQR", getResponse(newRequest("/foo")))
    assertThat(server.takeRequest().sequenceNumber).isEqualTo(0)
    assertContent("ABCDEFGHIJKLMNOPQR", getResponse(newRequest("/bar?baz=quux")))
    assertThat(server.takeRequest().sequenceNumber).isEqualTo(1)
    assertContent("ABCDEFGHIJKLMNOPQR", getResponse(newRequest("/z")))